Method of producing a flexible hose assembly for a manometer mercury line

Abstract

A flexible hose assembly for a mercury line for a manometer, and including a length of convoluted hose having an end, an inner sleeve positioned over the hose and having an end welded to the hose end, a hose fitting having an end and a welding section spaced from the end with the fitting end welded to the inner sleeve, a braid positioned over the hose and inner sleeve, and an outer sleeve positioned over the braid and having an end welded to the braid end and to the fitting at the welding section. A method of producing such a hose assembly.

I claim: 
     
       1. A method of producing a flexible hose assembly for a mercury line for a manometer, including the steps of: cutting a length of convoluted helical hose;   axially compressing a plurality of convolutions of said hose at one end thereof such that said compressed convolutions are in contact with each other;   placing an inner sleeve over said hose and said hose end;   welding an end of said inner sleeve to said hose end, thereby producing a first weldment;   providing a hose fitting having a fitting end and a welding section spaced from said fitting end;   welding said fitting end of said hose fitting to said first weldment, thereby producing a second weldment;   placing a braid over said hose and said inner sleeve;   placing an outer sleeve over said braid, said inner sleeve, and said hose end; and   welding an end of said outer sleeve to an end of said braid and to said fitting weld section.   
     
     
       2. A method as defined in claim 1 including the step of grinding said second weldment to a predetermined diameter. 
     
     
       3. A method as defined in claim 1 including maintaining the outside diameter of said hose end substantially the same as that of said hose.